近52年来北疆≥10℃初日时空变化特征及其对春玉米播期的影响
发布时间：2018-10-30 17:41
【摘要】：利用1961—2012年北疆48个气象台站的气象资料,采用气候倾向率、t-检验、一元线性回归、IDW插值等方法分析了北疆以及各地州近52年≥10℃初日的变化及其对春玉米播期的影响。结果表明:(1)1961—2012年北疆平均≥10℃初日整体以-0.9 d·10a-1的倾向率呈提前趋势,20世纪80年代之前,以平均4.8 d·10a-1的倾向率呈推迟趋势,之后至今呈持续提前趋势,20世纪90年代提前趋势最为明显,倾向率达-13.5 d·10a-1。(2)北疆春玉米平均播期的提前受气候变暖显著影响,21世纪初北疆春玉米平均播期在3月26日—5月5日,且较20世纪60年代,平均播期最多提前达10~21 d,大部分县市提前1~9 d。随着气候持续变暖,北疆地区春玉米平均播期将进一步提前。
[Abstract]:Based on the meteorological data of 48 meteorological stations in Northern Xinjiang from 1961 to 2012, the climatic tendency rate, t- test, and linear regression were used. IDW interpolation and other methods were used to analyze the changes of the first day of spring maize sowing in Northern Xinjiang and other regions in the past 52 years at 鈮，
本文编号：2300712
[Abstract]:Based on the meteorological data of 48 meteorological stations in Northern Xinjiang from 1961 to 2012, the climatic tendency rate, t- test, and linear regression were used. IDW interpolation and other methods were used to analyze the changes of the first day of spring maize sowing in Northern Xinjiang and other regions in the past 52 years at 鈮，
本文编号：2300712
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